SPRING BIASED RETRACTABLE HOSES

摘要

An extendable and retractable pressure hose can be constructed comprising an input connector, an output connector, an elastic inner hose, an outer cover, and one or more portions of the elastic inner hose engaged with the outer cover and disposed between the first and second ends of the hose. In such a hose, the input connector and output connector can be connected to each end of elastic inner hose and outer cover.

主权项

1. A hose having a first end and a second end configured to extend when an extending force exceeds a retracting force and to retract when the retracting force exceeds the extending force, the hose comprising:
a) a tube-shaped outer cover with an extended length, a retracted length and a natural inside diameter, wherein:
i) the outer cover can longitudinally extend to the extended length and longitudinally retract to the retracted length; andii) the outer cover is adapted to maintain a convoluted shape at both the retracted length and the extended length; b) a biasing coil capable of stretching to at least two times its natural length and having a tendency to return to its natural length when stretched, wherein:
i) the biasing coil is disposed inside of the outer cover and has a natural outside diameter which is greater than the natural inside diameter of the outer cover;ii) the retracting force is generated by the tendency of the biasing coil to return to its natural length when stretched; c) an input connector attached to the outer cover at the first end of the hose and designed to be removably attached to a source of pressurized fluid; and d) an output connector attached to the outer cover at the second end of the hose and designed to removably connect to a flow restricting device.